package com.zj.serveice;

public class CalService {

    public int add(int a, int b) {
        System.out.println("add");
        return a + b;
    }

    public int sum(int a, int b) {
        System.out.println("sum");
        return a * b;
    }

    public int div(int a, int b) {
        System.out.println("div");
        return a / b;
    }
}
